“SIXMOS” is a valid word. — 15 points Scrabble

misosa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces
oxims
sixmo

missa young woman
mosstiny leafy-stemmed flowerless plants
sims
misoa thick paste made from fermented soybeans and barley or rice malt; used in Japanese cooking to make soups or sauces
ismsa belief (or system of beliefs) accepted as authoritative by some group or school
oxim

sixthe cardinal number that is the sum of five and one
mixa commercially prepared mixture of dry ingredients
sisa female person who has the same parents as another person
sim
sox
sosan internationally recognized distress signal in radio code
mis
mos
isma belief (or system of beliefs) accepted as authoritative by some group or school
oms
xis

ishave the quality of being; (copula, used with an adjective or a predicate noun)
sothe syllable naming the fifth (dominant) note of any musical scale in solmization
moan indefinitely short time
midestruction of heart tissue resulting from obstruction of the blood supply to the heart muscle
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
oxan adult castrated bull of the genus Bos; especially Bos taurus
om
xithe cardinal number that is the sum of ten and one
osa mouth or mouthlike opening

SIXMOS